Certified Rhythm Analysis Technician (CRAT) Practice Exam

Disposable electrodes are the most commonly used type for ECG (electrocardiogram) procedures. This is primarily due to their convenience, hygiene, and efficiency in clinical settings. Disposable electrodes are designed for single use, ensuring that each patient receives a clean and sterile electrode, which reduces the risk of cross-contamination and infection. They are typically made of conductive materials and are easy to apply, making them ideal for quick setups during patient examinations.

The preference for disposable electrodes also stems from their ability to maintain adequate attachment to the skin, allowing for accurate and reliable readings during the ECG. In contrast, reusable electrodes require diligent cleaning and maintenance, which can be cumbersome and pose risks if not properly disinfected. Additionally, while silver is a common material found in some ECG electrodes—particularly in reusable ones—it is not classified as a type of electrode itself. The use of gels and pastes involves the application of conductive substances that enhance the electrode-skin interface, but they are not considered a type of electrode.

Therefore, the choice of disposable electrodes reflects a balance of safety, effectiveness, and practicality in the execution of ECGs.